Fnding a professional concrete polishing company can be difficult. The process can depend on who you hire and the experience they have. Always ask to see their portfolio of work. Because although they all may sand the concrete down, not everyone or company sands the same. Is a company that provides quailty work backed by years of experience along with the satisfied customers to prove it. Whenever you choose a concrete polishing company be sure to see their work. Specifically ask to see their last 5 jobs.